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Pt/N–TiO2 aerogel photocatalysts were obtained by means of sol–gel process followed by low temperature supercritical drying. Urea and guanidine-HCl were used as nitrogen sources. Pt clusters were loaded on photocatalysts surface by photoreduction process. Enhanced photocatalytic activities and H2 evolution rates were obtained on photocatalysts containing nitrogen impurities. Graphical Abstract ...
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